how would cleopatras needle probably have been affected if it had been in the cold, dry climate of siberia?

Question

it stood in egypt for 3,000 yrs where the climate was hot and dry

Answer 1

Most likely it would have been subjected to far more weathering; in paticular, a type of physical weathering called frost wedging. Cleopatra's needle is carved of granite and when exposed to constant freezing and thawing in severe climates such as most of Siberia experiences granite exhibits this type of weathering. Granite typically has small cracks and fissures or joints which can fill with water. Even though Siberia is relatively dry some water would be available to do this (over long periods of time especially). Water expands when it freezes which causes a wedging effect inside the crack and causes plates of rock to crack off. Over time this would most likely happen to Cleopatra's Needle in Siberia. Here's a good site if you want to see a picture of what granite looks like after frost wedging.
http://estes.on-line.com/rmnp/articles/frstwdg.html

Answer 2

Cold Dry Climate